Secret-key-assisted private classical communication capacity over quantum channels

Min-Hsiu Hsieh, Zhicheng Luo, Todd Brun
2008 Physical Review A. Atomic, Molecular, and Optical Physics  
We prove a regularized formula for the secret key-assisted capacity region of a quantum channel for transmitting private classical information. This result parallels the work of Devetak on entanglement assisted quantum communication capacity DHW05RI. This formula provides a new family protocol, the private father protocol, under the resource inequality framework that includes private classical communication without secret key assistance as a child protocol.
doi:10.1103/physreva.78.042306 fatcat:evz335sgtrgsvmytlxtxuzzedu